<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript" src="js/jquery-1.12.4.js" ></script>
	</head>
	<body>
		<div id="div1">
			我爱北京天安门
		</div>
		
		<input id="btn1" type="button" value="修改样式" />
		<script type="text/javascript">
			$(function(){
				$("#btn1").click(function(){
					/*$("#div1").css("background-color","skyblue")
							   .css("width","200px")
							   .css("height","200px");;*/
					$("#div1").css({
						"background-color":"skyblue","width":"200px","height":"200px"
					});
				});
			})
			
		</script>
	</body>
</html>
